A tool specialized for balancing motors, wheels, and propellers/rotors for radio controlled vehicles. RC Balancer can also be used to reduce electromagnetic interference with your receiver, FPV transmitter, telemetry, mav-links, motors, GPS, cameras, etc...
Using your device's motion sensors, data is collected, processed, and displayed. By making adjustments to your vehicle's parts between sessions, you can reduce excess vibration and electromagnetic interference to get a better performing vehicle.
Easily compare sessions to see if your adjustments have made an improvement or not. After a session is saved its data can be reviewed (min and max values for each axis, duration, date, name, etc...) You can also export a rendered graph, or export the data in JSON format for your own processing.
Youtube is full of videos on this subject.